Write a recursive function my seq(n) in Python called that returns a sub n, the nth term in the recursively-defined sequence given as follows:

a sub n =3a sub(n1) +28a sub(n2), a sub 0 =1 a sub 1 =5

In addition, please solve the recursive equation using the characteristic roots method and write down an explicit formula for an inside a comment at the bottom. You only have to write down the explicit formula, you dont have to show your work.